Hold-down for lasting machine



p 1964 J. s. KAMBORIAN ETAL 3,149,354

nowmowu FOR LASTING MACHINE Original Filed May 2, 1961 5 Sheets-Sheet lo 7:? w I 58\ INVENTORS .229. Jacob 5. Kamborlan BY Henry v.0. Ben/(enSept. 22, 1964 J. 5. KAMBORIAN ETAL 3,149,354

HOLD-DOWN FOR LAS'I'ING MACHINE Original Filed May 2, 1961 5Sheets-Sheet 2 Sept. 22, 1964 J. s. KAMBORIAN ETAL 3,149,354

HOLD-DOWN FOR LASTING MACHINE Original Filed May 2, 1961 5 Sheets-Sheet3 Se t. 22, 1964 J. 5. KAMBORIAN ETAL 3,149,354

HOLD-DOWN FOR LASTING MACHINE Original Filed May 2. 1961 5 Sheets-Sheet4 Sept. 22, 1964 J. 5. KAMBORIAN ETAL 3, 4

HOLD-DOWN FDR LASTING MACHINE Original Filed May 2, 1961 5 Sheets-Sheet5 United States Patent 3,149,354 HOLD-DGWN FOR LAS'TING MACHINE Jacob S.Karnborian, 133 Forest Ave., West Newton, Mass, and Henry v. d. Benken,West Roxhury, Mass; said V. d. Eenhen assignor to said KamhorianOriginal appiieation May 2, 1961, Ser. No. 107,156. Di-

vided and this application Aug. 2, 1962, Ser. No.

6 Claims. or. 12-14.2

This application is a division of copending application Serial No.107,156, filed May 2, 1961.

The parent application discloses an upper stretching and heel seatlasting machine that includes a post pivotally mounted on the piston rodof an air operated motor, a heel seat lasting unit, means for swingingthe post toward and away from a heel seat lasting unit, a last supportlocated at the upper end of the post for supporting bottom-up a lasthaving a shoe upper and insole thereon with the heel of the last facingthe heel seat lasting unit, an upper tensioning unit mounted on the posthaving pincers for gripping the toe and forepart portions of the upperand stretching the upper tightly on the last, and a hold-down unit. Theheel seat lasting unit comprises a heel clamping pad operative to clampthe upper against the last and wipers for wiping the lasting margin ofthe upper against the insole. The hold-down unit comprises a heightwisemovable hold-down foot operable to bear against the insole and clamp thelast and shoe between the last support and the hold-down foot duringpart of the lasting operation. Means are provided during the wipingoperation for raising the hold-down foot away from the insole so thatthe last and insole are forced directly against the wipers.

The instant invention relates to a hold-down construction which providesan improved arrangement for accomplishing the aforesaid results. Thehold-down comprises a hold-down foot that is movably mounted on themachine frame for heightwise movement and a movably mounted cam operableto raise or lower the hold-down foot.

In the accompanying drawings:

FIGURE 1 is a side elevation of the machine;

FIGURE 2 is a front elevation of the machine;

FIGURE 3 is a detail, partly in section, of the holddown unit;

FIGURE 4 is a side elevation of the hold-down unit;

FIGURE 5 is a view taken along the line 5-5 of FIG- URE 4;

FIGURE 6 is a showing of the shoe and last after the insole has beenbrought to bear against the hold-down foot;

FIGURE 7 is a plan view of the shoe as it is about to be clamped by theheel clamping pad; and

FIGURE 8 is an elevation in section showing the heel portion of the shoeand last at the completion of the machine cycle.

Referring to FIGURES 1 and 2, the machine comprises a frame 10 having aninclined plate 12. An air actuated motor 14, mounted on the plate 12,has a piston rod 16 extending upwardly therefrom that is verticallyguided in a guide bearing 18 secured to the frame. A post 26 ispivotally secured to the piston rod 16 by a pivot 22. A rod 24 isreceived in a socket in the upper end of the post 29. A swivel block 26is pivotally mounted for swinging movement about the axis of the rod 24.A last pin holder 28 is mounted at the upper end of the rod 24. A lastpin 30 is fastened in the last pin holder 28 and projects upwardlythereof. The last pin holder 28 receives a last supporting plate 32 onits upper surface, and the plate 32 has a hole through which the lastpin 30 extends. Parallel bars 34 are connected to and extend forwardlyof the block 26. An upper tensioning unit 36 is slidably mounted on thebars 34. A pair of air operated motors 38 are connected to the block 26and have piston rods 46 connected to the upper tensioning unit 36whereby actuation of the motors will move the unit 36 along the bars 34.

The upper tensioning unit 36 includes a toe rest roller 42, a frontpincers 44 and two side pincers 46. An air operated motor (not shown) isprovided in the unit 36 to raise and lower the pincers 44 and 46 inunison heightwise of the unit 36.

The post 20 is pivotally connected to a pitman 48. An air operated motor50, mounted in the frame 10, has a piston rod 52 connected to the pitman48 by a mechanical linkage that includes a rack 54 and a crank 56whereby actuation of the motor causes swinging movement of the post 20about the pivot 22.

A heel seat lasting unit 58 is mounted in the frame 10 rearwardly of theupper tensioning unit 36. The unit 58 comprises a main slide plate 68(FIGURE 3) slidably mounted for forward and rearward movement in theframe 10. A block 62 (FIGURE 1) is secured to the plate 60, and afloating actuator 64 is secured to the block 62. The floating actuator64 includes an air operated motor 66 connected to the block 62 by atoggle linkage 68 whereby actuation of the motor 66 causes the mainslide plate 68 and the members carried thereby to move forwardly andrearwardly in the frame. A U-shaped heel clamping pad 78 is mounted onthe plate 68 and is connected to air actuated motors (not shown) so asto be driven forwardly with respect to the plate in the manner describedbelow. An air operated motor 72, anchored to the plate (FIG- URES 1 and3) is drivingly connected to Wipers 74 (FIG- URES 2 and 8) mounted abovethe pad so as to move the wipers in the manner described below.

A hold-down unit 76 is mounted on a frame cover 78 located above theplate 60, the pad 70 and the wipers 74 (see FIGURES 3, 4 and 5). Theunit 76 comprises a lever 80 pivoted to a clevis 82 on the cover 78 by apivot 84. A link 86 is pivoted to the cover 78 below the pivot 84, andboth the lever 38 and the link 86 are pivotally connected to a hold-downfoot 88. The lever 80, link 86 and foot 88 thus form a parallel linkagemechanism whereby counterclockwise movement of the lever (FIGURE 4)imparts a substantially rectilinear downward movement to the foot 88 andclockwise movement of the lever 81) imparts a substantially rectilinearupward movement to the foot 88.

A pin 90 is rotatably mounted in the cover 78 rearwardly of the pivot84, and a roller or cam follower 92 is afixed to the pin 98. A roller orcam follower 94 is rotatably mounted in a clevis 96 that is slidablymounted for up and down movement at the rear end of the lever 80opposite the roller 92. A screw 98 bears against the upper surface ofthe clevis 96 to limit the upward movement of the clevis 96 in the lever80.

An air operated spring return motor 189 is secured to the cover '78. Thepiston rod 162 of the motor 169 has a cam 194 secured thereto that isinterposed between the rollers 92 and 94. A tension spring 186 extendingfrom the pin 99 to a pin 188 fixed to the lever 88 urges the roller 94against the cam 184. The cam 194 has a high portion that is normallyinterposed between the rollers 92, 94. The actuation of the motor 169 tobring a low portion 112 of the cam between the rollers will cause thespring 1% to move the roller 94, which acts as a cam follower,downwardly against the cam portion 112, swing the lever 88 clockwise,and thereby raise the holddown foot 88, for a purpose that is explainedbelow.

Although the disclosed apparatus can be used to assemble an upper on alast and heel seat last the upper onto the insole, it has particularutility in carrying out the method disclosed in pending applicationSerial No. 80,- 919, filed January 5, 1961. In the referred to method, aflaccid counter coated on both of its surfaces with ad- 9 hesive isinserted in a pocket formed between an upper and a liner at the heel endof the upper, the upper is draped about the last, tensioning forces areapplied at the toe end of the upper to wrap the upper about the heel endof the last and initiate the molding of the counter to the shape of thelast, the last is moved to a heel seat lasting position and forcedupwardy against a hold-down, upward tensioning forces are applied at thetoe end of the upper to assemble the upper on the last, a clamping forceis applied at the heel of the last to maintain the upper stationary onthe last and to complete the molding of the counter to the shape of thelast, and the margins of the upper and counter are wiped down onto aninsole located on the bottom of the last to thereby unite the lastedmargin of the upper to the insole by adhesively bonding the counter tothe upper and insole.

In setting up the machine for a particular size of last, the adjustmentsdescribed in the parent application are made.

Referring to FIGURES 6, 7 and 8, a last 114 is provided having an insole116 mounted on its bottom and an upper H8 draped thereon. A liner 124iis secured to the heel of the upper to engage the heel of the last, anda counter 12?. is located in the pocket formed between the upper and theliner. The last is placed bottom-up on the last supporting plate 32 withthe pin 39 entering the conventional last pin hole in the last. The toeportion of the upper and last is supported on the toe roller 42, the toeend of the upper margin is inserted between the jaws of the pincers 44,and the forepart portions of the upper margin are inserted between thejaws of the side pincers 46. At this time the upper end of the liner 128is substantially level with the insole 116 and the upper margins of thecounter 1 2 and upper 118 at the heel end of last extend above theinsole 116 as indicated in FIG- URE 6.

The control system disclosed in the parent application is now actuated.This causes the pincers 44 and 46 to close and grip the margin of theupper. This is followed by actuation of the motors 38 to cause the uppertensioning mechanism including the pincers 44 and 46 to move forwardlyon the bars 34 to thereby horizontally stretch the upper in thedirection of the toe of the last and cause a firm wrapping of the upperabout the heel of the last and a tension force on the counter to startto mold it to the shape of the last.

The motor 59 is now actuated to swing the post 2% clockwise (FIGURE 1)about the pivot 22 to a position where the shoe is adjacent to but notin engagement with the heel seat lasting unit 58 and the hold-down unit76. In this position the post 21? is in alignment with the holddown foot83 but the insole 116 is below the bottom of the hold-down foot. Inaddition, in this position, the shoe upper and last are not inengagement with the heel clamping pad 73.

The motor 14 is now actuated to cause it to raise the post 26 and thusraise the last and shoe until the insole 116 bears against the hold-downfoot 88. In this position the shoe and last are clamped between thehold-down foot 88 and the last supporting plate 32, as indicated inFIGURE 6, with the upwardly facing surface of the insole slightly belowthe top surface of the clamping pad 7% and the bottom surfaces of thewipers 74.

The pincers 44 and 46 are now raised in unison to thereby apply anupward tension to the margin of the upper 118 at its toe end andforepart portions to thereby stretch the upper tightly on the last andassemble it in proper position for the subsequent heel seat lastingoperation. Since the last and shoe are clamped at this time between thefoot 38 and the plate 32, upward movement of the pincers does not shiftthe last.

The motor 66 is now actuated to cause the toggle linkage 68 to move theblock 6% and the heel seat lasting unit 58 carried thereby from itsnormal out-of-the-way position to a position adjacent the shoe and last.This is followed by a forward movement of the clamping pad 70 toward theheel of the last. The driving means for the pad 79 is so constructedthat the pad moves forwardly in the open, solid line position of FIGURE7 until the bight of the pad engages the shoe after which the legs ofthe pad move toward each other and engage the shoe as indicated indotted lines in FIGURE 7.

After the pad 78 has been brought against the shoe, the motor 72 isactuated to cause the Wipers 74 to move forwardly and inwardly and wipeor fold the margins of the upper 118 and counter 122 down against theinsole 116. The wiping pressure completes the molding of the counter andcauses the counter, through the adhesive on its surfaces, to bond thewiped-in margin of the upper to the insole. During this movement of thewipers, the motor is actuated to move the cam 1G4 forwardly to presentthe low cam portion 112 between the rollers 2, 94 and thus cause theraising of the hold-down foot 88 as indicated in PTGURE 8. The motor 14now applies upward pressure by the last directly against the wipers toprovide an overwiping and bedding pressure between the wipers and thewiped-in margin of the upper during the latter part of the wi er strokeand also after the termination of the wiper stroke.

This concludes the work phase of the machine cycle, and the control isnow actuated to return the machine parts to their original positions.

It should be understood that the present disclosure is for the purposeof illustration only and that this invention includes all modificationsand equivalents which fall within the scope of the appended claims.

We claim:

1. A hold-down comprising: a frame; a lever pivoted to the frame betweenits ends; a hold-down foot pivoted to one end of the lever and dependingdownwardly therefrom; a link extending alongside the lever and pivotedat its ends to the frame and the hold-down foot; a cam followerconnected to the bottom of the lever at the end of the lever remote fromthe hold-down foot; a movably mounted profiled cam positioned beneaththe cam follower; means for yieldably urging the cam follower againstthe cam; and means for moving the cam relative to the cam follower.

2. A hold-down comprising: a frame; a lever pivoted to the frame betweenits ends; a hold-down foot pivoted to one end of the lever and dependingdownwardly therefrom; a link extending alongside the lever and pivotedat its ends to the frame and the hold-down foot; a first cam followerslidably mounted for heightwise movement in the end of the lever remotefrom the hold-down foot; a second cam follower mounted below the firstcam follower; a movably mounted profiled cam interposed between the camfollowers; and means for yieldably urging the first cam follower againstthe cam.

3. The hold-down according to claim 2 further comprising: a screwthreaded into the lever above the first cam follower and bearingthereagainst.

4. A hold-down comprising: a frame; a lever pivoted to the frame betweenits ends; a hold-down foot pivoted to one end of the lever and dependingdownwardly therefrom; a link extending below the lever and pivoted atits ends to the frame and the hold-down foot; a clevis slidably mountedfor heightwise movement in the end of the lever remote from thehold-down foot; a first roller rotatably mounted in the clevis; a secondroller mounted in the frame below the first roller; a fiuid actuatedmotor mounted on the frame having a piston rod extending therefrom; aprofiled cam connected to the piston rod and interposed between therollers; and a tension spring extending from the lever to the frameadjacent the rollers.

5. A hold-down comprising: a frame; a lever pivoted to the frame betweenits ends; a hold-down foot pivoted to one end of the lever and dependingdownwardly therefrom; a link extending alongside the lever and pivotedat its ends to the frame and hold-down foot; a first cam is a followermounted in the end of the lever remote from the hold-down foot; a secondcam follower mounted below the first cam follower; a movably mountedprofiled cam interposed between the cam followers; and means foryieldably urging the first cam follower against the cam.

6. A hold-down comprising: a frame; a lever pivoted to the frame betweenits ends; a hold-down foot pivoted to one end of the lever and dependingdownwardly therefrom; a link extending below the lever and pivoted atits ends to the frame and the hold-down foot; a clevis mounted in theend of the lever remote from the holddown foot; a first roller rotatablymounted in the clevis; a second roller mounted in the frame below thefirst roller; a fluid actuated motor mounted on the frame hav- 15 & inga piston rod extending therefrom; a profiled cam connected to the pistonrod and interposed between the rollers; and a tension spring extendingfrom the lever to the frame adjacent the rollers.

References Cited in the file of this patent UNITED STATES PATENTS938,513 Pym Nov. 2, 1909 1,010,800 Pym Dec. 5, 1911 1,060,477 MeyersApr. 29, 1913 2,989,931 Gilbride Apr. 25, 1961 FOREIGN PATENTS 400 GreatBritain of 1911

1. A HOLD-DOWN COMPRISING: A FRAME; A LEVER PIVOTED TO THE FRAME BETWEENITS ENDS; A HOLD-DOWN FOOT PIVOTED TO ONE END OF THE LEVER AND DEPENDINGDOWNWARDLY THEREFROM; A LINK EXTENDING ALONGSIDE THE LEVER AND PIVOTEDAT ITS ENDS TO THE FRAME AND THE HOLD-DOWN FOOT; A CAM FOLLOWERCONNECTED TO THE BOTTOM OF THE LEVER AT THE END OF THE LEVER REMOTE FROMTHE HOLD-DOWN FOOT; A MOVABLY MOUNTED PROFILED CAM POSITIONED BENEATHTHE CAM FOLLOWER; MEANS FOR YIELDABLY URGING THE CAM FOLLOWER